JobScheduler can monitor file creation, file change and timestamp change with a (standalone) job. This job can then start a job chain or job group.
An example how to configure a "file-watcher":
<job nameh1. "scheduler_file_notification_1">
<script language"shell"><![CDATA[
set
echo %SCHEDULER_JOB_NAME% echo %SCHEDULER_TASK_TRIGGER_FILES% rem del %SCHEDULER_TASK_TRIGGER_FILES% ]]></script> <start_when_directory_changed directory = "c:/temp" regex = "^file[1|2]\.xml$"/>
</job>
This job will watch the folder "c:/temp" on a ms-windows system. Every event regarding the files "file1.xml" and/or "file2.xml" will fire the execution of the embedded script (in this case it will echo some values for JS-Environment Variables).